A family of Microsoft word processing software products for creating web, email, and print documents.
Select one of those words that are obviously incorrect, such as "wongr," and then click Review tab > Language group > Language > Set Proofing Language. In the dialog box, verify that you see the correct language specified for the selection and also that "Do not check spelling or grammar" is cleared.
If you can't get it sorted, consider sharing the problem document with the forum.